. immediately you get the question, you design against those, but look at japan. if you had an earthquake with a magnitude of nine, how does one answer that question? you could always have and 9.5 occur. is there a rational way of addressing that? >> my explanation is one i know you understand. we look that up faults around the u.s. and have that information's. look at the historical record, but that the maximum earthquake, and with everything we do, we add margins, but we also looked at the specific location in relation to the fault. we considered the kinds of soil and rock formations between the fault location and the site, and analysis to see the ground motion that would actually be seen at the site. and we design for an earthquake of a certain size. i am falling into the trap of saying of a certain size, of the ground motion of a certain magnitude. having said that, with all these other things, severe accident management guideline, the b five b procedures, we have procedures and equipment in place that says, even if we were wrong and the plant suffered this serious event, we have in f